※Except for CO-52/CO-152
※ ※
CO SERIES
COU SERIES
CONCEALED DOOR CLOSERSModel chart
Installation
Door Cut dimension
CONCEALED DOOR CLOSERS
No.COU-153R
● 2 to 6:Size
● Right hand or Left hand has to be specified for COU-52,53,152,153,52BC
● ES:ES Stopper Model(option)● H:For Hotel Door(Thinner guide rail)
● No number : Without hold-open● 1 : With hold-open
● U: Thinner body type
frame
Dooropening
directions
frame frameLeft hand doorRight hand door
DoorDoor
●COU-52,53 (Thinner body type)(Body thickness 28mm)
Steel door Wooden door Steel door Wooden door
●CO-52 (Body thickness 31mm)
●CO-53, 54 (Body thickness 36mm)
Steel door Wooden door Steel door Wooden door
●CO-55, 56 (Body thickness 48mm)
28.5 28.5
36 or more 40 or more 45 or more 50 or more
36.5
60 or more 65 or more
48.548.536.531.5
40 or more 45 or more
31.5
Model No.With hold-open With backcheck Width (mm)For Hotel Door(Thinner guide rail) Weight (kg) Steel door Wooden door
PageWithout hold-open
Applicable door size Applicable door thickness (mm)
COU-52
COU-53
COU-152
COU-153
COU-52BC
COU-53BC
900
950
45 or less
65 or less36 or more 40 or more 6
Model No.With hold-open With backcheck Width (mm) Weight (kg) Steel door Wooden door
PageWithout hold-open
Applicable door size Applicable door thickness (mm)
CO-52
CO-53
CO-54
CO-55
CO-56
CO-152
CO-153
CO-154
CO-155
CO-52BC
CO-53BC
CO-54BC
900
950
1050
1200
1500
45 or less
65 or less
85 or less
120 or less
180 or less
40 or more
45 or more
60 or more
45 or more
50 or more
65 or more
6
7
7
Model No.With hold-open With backcheck Width (mm) Weight (kg) Steel door Wooden door
PageWithout hold-open
Applicable door size Applicable door thickness (mm)
CO-155ES
CO-156ES
1200
1500
120 or less
180 or less60 or more 65 or more
CONCEALED DOOR CLOSERSSpecification and adjustment
Speed adjustment range (CO-52/CO-152)COU SERIES(Thinner body type)
CO SERIES
ES Stopper Model(Option)
Latching action function (Except for CO-52/CO-152)
Speed adjustment valve
Latching action adjustment valve
Latching action adjustment valve
1st speed adjustment valve
2nd speed adjustment valve
2nd speed adjustment valve
● There are two speed ranges for door closing speed.
● Those ranges are classified into two stages of the 1st speed range
which controls general door closing speed and the 2nd speed range.
● Those speeds can be adjusted independently.
● Closing time from the door opened at 90 degrees is appropriately 5 to
8 seconds. (Set the 2nd speed slightly slower than the 1st speed.)
Speed adjustment range (Except for CO-52/CO-152)
● There are two speed ranges for door closing speed.
● Those ranges are classified into three stages, 1st speed range
which controls general door closing speed, 2nd speed range,
and latching action range.
● Those speeds can be adjusted independently.
● Closing time from the door opened at 90 degrees is appropriately 5 to
8 seconds. (Set the 2nd speed slightly slower than the 1st speed.)
2nd speed range
1st speed range
Latching action range
2nd speed range
1st speed range
Slower Faster
1st speed adjustment valve
Latching action adjustment valve
2nd closing speed adjustment valve
1st closing speed adjustment valve
Hexagon socket wrench for adjustment (3mm)
● The latching action does not move slower than the 2nd speed.
● Door can be closed by the latching action function to quickly close in 2 degrees
before closing position.
●CO-55,56●COU-52,53
●CO-52/CO-152
●CO-53,54
2 3
Hydraulic backcheck function (CO-55,56)
● This function prevents accidents and injuries and door damage which occurs due to a door suddenly
opening by a strong wind or rough handling before it happens.
● The door becomes heavier when it operates, however, this is all by design.
The door opens smoothly if it is slowly pushed.
● When installing the door closer equipped with the backcheck function, sufficiently reinforce the
hanging hardware and supporting plate.
● Mechanical backcheck is available on models COU-52, 53, CO-52, 53, 54.Backcheck operating rangeBB
BBB
B
BB
Stronger Weaker
Backcheck adjustment valve
Backcheck adjustment valve
Hexagon socket wrench for adjustment (3mm)
Back check device(for "Mechanical backcheck")
1st closing speed adjustment valve
2nd closing speed adjustment valve
COU-52H
COU-53H
CONCEALED DOOR CLOSERSModel chart
Installation
Door Cut dimension
CONCEALED DOOR CLOSERS
No.COU-153R
● 2 to 6:Size
● Right hand or Left hand has to be specified for COU-52,53,152,153,52BC
● ES:ES Stopper Model(option)● H:For Hotel Door(Thinner guide rail)
● No number : Without hold-open● 1 : With hold-open
● U: Thinner body type
frame
Dooropening
directions
frame frameLeft hand doorRight hand door
DoorDoor
●COU-52,53 (Thinner body type) (Body thickness 28mm)
Steel door Wooden door Steel door Wooden door
●CO-52 (Body thickness 31mm)
●CO-53, 54 (Body thickness 36mm)
Steel door Wooden door Steel door Wooden door
●CO-55, 56 (Body thickness 48mm)
28.5 28.5
36 or more 40 or more 45 or more 50 or more
36.5
60 or more 65 or more
48.548.536.531.5
40 or more 45 or more
31.5
Model No.With hold-open With backcheck Width (mm)For Hotel Door(Thinner guide rail) Weight (kg) Steel door Wooden door
PageWithout hold-open
Applicable door size Applicable door thickness (mm)
COU-52
COU-53
COU-152
COU-153
COU-52BC
COU-53BC
900
950
45 or less
65 or less36 or more 40 or more 6
Model No.With hold-open With backcheck Width (mm) Weight (kg) Steel door Wooden door
PageWithout hold-open
Applicable door size Applicable door thickness (mm)
CO-52
CO-53
CO-54
CO-55
CO-56
CO-152
CO-153
CO-154
CO-155
CO-52BC
CO-53BC
CO-54BC
900
950
1050
1200
1500
45 or less
65 or less
85 or less
120 or less
180 or less
40 or more
45 or more
60 or more
45 or more
50 or more
65 or more
6
7
7
Model No.With hold-open With backcheck Width (mm) Weight (kg) Steel door Wooden door
PageWithout hold-open
Applicable door size Applicable door thickness (mm)
CO-155ES
CO-156ES
1200
1500
120 or less
180 or less60 or more 65 or more
CONCEALED DOOR CLOSERSSpecification and adjustment
Speed adjustment range (CO-52/CO-152)COU SIRIES (Thinner body type)
CO SIRIES
ES Stopper Model (option)
Latching action function (Except for CO-52/CO-152)
Speed adjustment valve
Latching action adjustment valve
Latching action adjustment valve
1st speed adjustment valve
2nd speed adjustment valve
2nd speed adjustment valve
● There are two speed ranges for door closing speed.
● Those ranges are classified into two stages of the 1st speed range
which controls general door closing speed and the 2nd speed range.
● Those speeds can be adjusted independently.
● Closing time from the door opened at 90 degrees is appropriately 5 to
8 seconds. (Set the 2nd speed slightly slower than the 1st speed.)
Speed adjustment range (Except for CO-52/CO-152)
● There are two speed ranges for door closing speed.
● Those ranges are classified into three stages, 1st speed range
which controls general door closing speed, 2nd speed range,
and latching action range.
● Those speeds can be adjusted independently.
● Closing time from the door opened at 90 degrees is appropriately 5 to
8 seconds. (Set the 2nd speed slightly slower than the 1st speed.)
2nd speed range
1st speed range
Latching action range
2nd speed range
1st speed range
Slower Faster
1st speed adjustment valve
Latching action adjustment valve
2nd closing speed adjustment valve
1st closing speed adjustment valve
Hexagon socket wrench for adjustment (3mm)
● The latching action does not move slower than the 2nd speed.
● Door can be closed by the latching action function to quickly close in 2 degrees
before closing position.
●CO-55,56●COU-52,53
●CO-52/CO-152
●CO-53,54
2 3
Hydraulic backcheck function (CO-55,56)
● This function prevents accidents and injuries and door damage which occurs due to a door suddenly
opening by a strong wind or rough handling before it happens.
● The door becomes heavier when it operates, however, this is all by design.
The door opens smoothly if it is slowly pushed.
● When installing the door closer equipped with the backcheck function, sufficiently reinforce the
hanging hardware and supporting plate.
● Mechanical backcheck is available on models COU-52, 53, CO-52, 53, 54.Backcheck operating rangeBB
BBB
B
BB
Stronger Weaker
Backcheck adjustment valve
Backcheck adjustment valve
Hexagon socket wrench for adjustment (3mm)
Back check device(for "Mechanical backcheck")
1st closing speed adjustment valve
2nd closing speed adjustment valve
COU-52H
COU-53H
CONCEALED DOOR CLOSERSSpecification and how to adjust
CONCEALED DOOR CLOSERS CONCEALED DOOR CLOSERSParts and accessories
COU-152CO-152
COU-153CO-153CO-154CO-155
Model No. Adjustment range
0〜3.6kgf·m (0〜36N·m)
0〜3.1kgf·m (0〜31N·m)
0〜2.7kgf·m (0〜27N·m)
0〜3.7kgf·m (0〜37N·m)
CO-155ESCO-156ES
Model No. Adjustment range
3〜15kgf·m (30〜150N·m)
2〜14kgf·m (20〜140N·m)
●Adjustment of hold-open angle
・Hold-open angle can be adjusted by changing the installation position
of the hold-open device.
・The hold-open angle is a maxium opening angle in the case of a stopper
device (non hold-open).
●Adjustment of hold-open force
・Hold-open force can be adjusted by turning the adjustment screw.
・Reference for adjustment
Hold-open device, stopper device installation position
6 5 4 3 2 1
Stronger Weaker
Adjustment nut (M5)
Hold-open device
●Stopper 6-A is equipped for "without hold-open type".COU-52,53,CO-52,53,54,55,56
●Stop metal fitting 6-B (hold open device) is equipped for“with hold open type”. COU-152,153,CO-152,153,154,155
●Backcheck device 6-C is equipped for "with mechanical backcheck type". COU-52BC,53BC,CO-52BC,53BC,54BC
No.1
2
Body
Mounting plate
Name of Parts and Accessories
6
3
4
5
6-A
3-A 3-B
5-A 5-B 5-C
6-B 6-D 6-E6-C
7
8
9
10
11
12
13
14
Stopper(for "Without hold-open")
Arm Arm for ES-Stopper
4-A 4-B
Guide rail for H type
Slider Slider for ES-Stopper Slider for H type
Washer
Hexagon socketFlat head screw (M5, L=16)
Stop metal fitting (for "With hold-open")
Stopper forES-Stopper
Stopper for H type
Backcheck device (for "Mechanical backcheck")
○+Flat head machine screw (With M3 head)(M4, L=6-2pcs)
○+Flat head machine screw (With M4 head)(M5, L=12-5pcs)
○+Flat head tapping screw(φ4, L=25-5pcs)
○+Flat head machine screw(M5, L=12-4pcs)
○+Flat head machine screw(M6, L=12-4pcs)
○+Flat head machine screw(M5, L=12-4pcs)
○+Flat head machine screw(M6, L=16-4pcs)
○+Flat head tapping screw(φ5, L=30-4pcs)
○+Flat head machine screw (with M4 head)(M5, L=12-4pcs)
○+Flat head machine screw (with M4 head)(M5, L=12-4pcs)
○+Flat head tapping screw(φ4, L=25-4pcs)
‒
CO-52,53,54COU-52,53 CO-55,56
4 5
6 5 4 3 2 1
ES Stopper (option)
Hold-open device, stopper device installation position
Stronger Weaker
ES Stopper (option)
・Hold-open force can be adjusted by turning the adjustment screw.
・Reference for adjustment
5A5C
6C
6E6A
6B
6D4A
4B
1011
7
8
9
3A3B
5B
14
1312
2
1
Guide rail
One Touch Joint Function Silent slider ES StopperArm and Slider can be
jointed by hand without
tool. This shortens the
installation time.Stopper with stop setting up to size 6 torque
Optional Specification
One-touch detachable type
Snap!
CONCEALED DOOR CLOSERSSpecification and how to adjust
CONCEALED DOOR CLOSERS CONCEALED DOOR CLOSERSParts and accessories
COU-152CO-152
COU-153CO-153CO-154CO-155
Model No. Adjustment range
0〜3.6kgf·m (0〜36N·m)
0〜3.1kgf·m (0〜31N·m)
0〜2.7kgf·m (0〜27N·m)
0〜3.7kgf·m (0〜37N·m)
CO-155ESCO-156ES
Model No. Adjustment range
3〜15kgf·m (30〜150N·m)
2〜14kgf·m (20〜140N·m)
●Adjustment of hold-open angle
・Hold-open angle can be adjusted by changing the installation position
of the hold-open device.
・The hold-open angle is a maxium opening angle in the case of a stopper
device (non hold-open).
●Adjustment of hold-open force
・Hold-open force can be adjusted by turning the adjustment screw.
・Reference for adjustment
Hold-open device, stopper device installation position
6 5 4 3 2 1
Stronger Weaker
Adjustment nut (M5)
Hold-open device
●Stopper 6-A is equipped for "without hold-open type". COU-52,53,CO-52,53,54,55,56
●Stop metal fitting 6-B (hold open device) is equipped for“with hold open type”. COU-152,153,CO-152,153,154,155
●Backcheck device 6-C is equipped for "with mechanical backcheck type". COU-52BC,53BC,CO-52BC,53BC,54BC
No.1
2
Body
Mounting plate
Name of Parts and Accessories
6
3
4
5
6-A
3-A 3-B
5-A 5-B 5-C
6-B 6-D 6-E6-C
7
8
9
10
11
12
13
14
Stopper(for "Without hold-open")
Arm Arm for ES-Stopper
4-A 4-B
Guide rail for H type
Slider Slider for ES-Stopper Slider for H type
Washer
Hexagon socketFlat head screw (M5, L=16)
Stop metal fitting (for "With hold-open")
Stopper forES-Stopper
Stopper for H type
Backcheck device (for "Mechanical backcheck")
○+Flat head machine screw (With M3 head)(M4, L=6-2pcs)
○+Flat head machine screw (With M4 head)(M5, L=12-5pcs)
○+Flat head tapping screw (φ4, L=25-5pcs)
○+Flat head machine screw (M5, L=12-4pcs)
○+Flat head machine screw (M6, L=12-4pcs)
○+Flat head machine screw (M5, L=12-4pcs)
○+Flat head machine screw (M6, L=16-4pcs)
○+Flat head tapping screw (φ5, L=30-4pcs)
○+Flat head machine screw (with M4 head) (M5, L=12-4pcs)
○+Flat head machine screw (with M4 head) (M5, L=12-4pcs)
○+Flat head tapping screw (φ4, L=25-4pcs)
‒
CO-52,53,54COU-52,53 CO-55,56
4 5
6 5 4 3 2 1
ES Stopper (option)
Hold-open device, stopper device installation position
Stronger Weaker
ES Stopper (option)
・Hold-open force can be adjusted by turning the adjustment screw.
・Reference for adjustment
5A5C
6C
6E6A
6B
6D4A
4B
1011
7
8
9
3A3B
5B
14
1312
2
1
Guide rail
One Touch Joint Function Silent slider ES StopperArm and Slider can be
jointed by hand without
tool. This shortens the
installation time.Stopper with stop setting up to size 6 torque
Optional Specification
One-touch detachable type
Snap!
CONCEALED DOOR CLOSERSDRAWING
76°20
(offset dimension) ①
98°92°86°81°
② ③ ④ ⑤
105°
⑥
36
29
77.7
12
3.2
193
9
Cut off
Size 3, 4
Hold-open device, stopper device, backcheck device installation position
126
149
158 13
29
8.5
23
149
P
3.2
9
66
3
158
19
36
20
8
120
29 106
Guide rail
126
240
286
φ14
126
23
Body
286
270
530
8
22
126 13
Arm
568(Cut off on lateral door)
400 2112
④⑤⑥ ①②③
2nd speed adjustment valve
1st speed adjustment valve
5-○+Flat head machine screw M5×12ℓ(with M4 head)5-○+Tapping screw φ4×25ℓ
4-○+Flat head machine screw M5×12ℓ4-○+Tapping screw φ5×30ℓ
Latching speed adjustment valve
Maximum. Opening angle
TypeHold-open, stopper, backcheck device installation position"P" dimension
●This drawing shows right opening door.●This model can be used on both RH and LH doors.●Door stopper must be installed
together.
Right hand door Left hand door
Position of door stopper device15mm or more
Center of hinge
93.5
48
29
10.5
13.5
319
29
10
78
156
138
114.5
10.5
156
319
138
48
32
1335
Hold-open device, stopper device installation position
13 126
22
φ16
126
324
Body
530
368348
126126
22
13
Guide rail
25
10
Arm
113553(Cut off on lateral door)
Backcheck valve400
12.5
65 or more60 or more120 or less
180 or less
1200
150077° 82° 87° 93° 99° 106°
CO-55CO-56
CO-155
Cut off
Latching speed adjustment valve
P
①②③④⑤⑥
2nd speed adjustment valve
1st speed adjustment valve
22.5
5-○+Flat head machine screw M5×12ℓ(with M4 head)
4-○+Flat head machine screw M6×16ℓ
Size 5, 6
20
(offset dimension) ① ② ③ ④ ⑤ ⑥
Model Applicable door size Applicable door thickness(mm)
Without hold-open With hold-open Width(mm) Weight(kg) Steel door Wooden door
Maximum. Opening angle
TypeHold-open device, stopper device installation position"P" dimension
●This drawing is for CO-55, 56 right hand.●This model can be used on both RH and LH doors.●Door stopper must be installed
together.●2nd closing speed is adjusted with
uninstallation of closer unit.
Right hand door Left hand door
50 or more45 or more65 or less
85 or less
950
1050CO-53CO-54
CO-153CO-154
Model Applicable door size Applicable door thickness(mm)
Without hold-open With hold-open
CO-53BCCO-54BC
With backcheck Width(mm) Weight(kg) Steel door Wooden door
Center of hinge
Guide rail
Body
1st speed adjustment valve
Center of hinge
2nd speed adjustment valve
4-○+Flat head machine screw M5×12ℓ4-○+Tapping screw φ5×30ℓ
1234
Hold-open device, stopper device, backcheck device installation position
56
93
5-○+Flat head machine screw M5×12ℓ(with M4 head)
5-○+Tapping screw φ4×25ℓ
Arm
530
19
3.2
12
29
146
400
19
13 126 126 126 126 13
29
21
22
9.5 1299.5
155.5
542(Cut off on lateral door)
276
8 260 8
158
276155.5
58
.58
.59
3.2
3
31
P
23.5 229
φ12
158
23.5
20
31
70
.2
Size 2
45 or more40 or more45 or less900
A
B
19mm
29mm
14.5mm
23mm
76° 81° 86° 92° 98° 105°CO-52 CO-152 20
(offset dimension) ① ② ③ ④ ⑤ ⑥
Model
ModelCOU-52,53,
152,153,52BC,53BC
COU-52H,53H
Applicable door size Applicable door thickness(mm)
Without hold-open With hold-open
CO-52BC
With backcheck Width(mm) Weight(kg) Steel door Wooden door
Maximum. Opening angle
TypeHold-open, stopper, backcheck device installation position"P" dimension
●This drawing shows right opening door.●This model can be used on both RH
and LH doors.●Door stopper must be installed
together.
Right hand door Left hand door
Cut off
Position of door stopper device15mm or more
DRAWING
CONCEALED DOOR CLOSERS
Maximum. Opening angle
TypeHold-open, stopper, backcheck device installation position
Hold-open, stopper, backcheck device installation position depends on "P" dimension. Hold-open, stopper, backcheck device installation position depends on "P" dimension.
Hold-open, stopper, backcheck device installation position depends on "P" dimension. Hold-open, stopper, backcheck device installation position depends on "P" dimension.
75°20
(offset dimension)"P" dimension
①
97°91°86°80°
② ③ ④ ⑤
104°
⑥
Position of door stopper device15mm or more
Cut off
39
3.2
68.2
12A
28
BCenter of hinge
Hold-open device, stopper device, backcheck device installation position
23
B
152
160
11.5
12613
296
φ12
250
8
160
3.2
53.5
9A3
152
P
19
28
296
280
126126
23
126
530
8
Guide rail
Arm22
146
6 105
544(Cut off on lateral door)
400
13
12 21
2nd speed adjustment valve
1st speed adjustment valve
5-○+Flat head machine screw M5×12ℓ(with M4 head)5-○+Tapping screw φ4×25ℓ
4-○+Flat head machine screw M5×12ℓ(with M4 head)
4-○+Tapping screw φ4×25ℓ
①⑥ ⑤ ④ ③ ②
Body
●This drawing is for COU-52, 53 right hand.●This model has right hand and left hand.●Door stopper must be installed together.
Latching speed adjustment valve
Size 2, 3 (Thinner body type)
Right hand door Left hand door
40 or more36 or more45 or less
65 or less
900
950COU-52COU-53
COU-152COU-153
Model Applicable door size Applicable door thickness(mm)
Without hold-open With hold-open
COU-52BCCOU-53BC
With backcheck
COU-52HCOU-53H
For Hotel Door(Thinner guide rail) Width(mm) Weight(kg) Steel door Wooden door
6 7
CONCEALED DOOR CLOSERSDRAWING
76°20
(offset dimension) ①
98°92°86°81°
② ③ ④ ⑤
105°
⑥
36
29
77.7
12
3.2
193
9
Cut off
Size 3, 4
Hold-open device, stopper device, backcheck device installation position
126
149
158 13
29
8.5
23
149
P
3.2
9
66
3
158
19
36
20
8
120
29 106
Guide rail
126
240
286
φ14
126
23
Body
286
270
530
8
22
126 13
Arm
568(Cut off on lateral door)
400 2112
④⑤⑥ ①②③
2nd speed adjustment valve
1st speed adjustment valve
5-○+Flat head machine screw M5×12ℓ(with M4 head)5-○+Tapping screw φ4×25ℓ
4-○+Flat head machine screw M5×12ℓ4-○+Tapping screw φ5×30ℓ
Latching speed adjustment valve
Maximum. Opening angle
TypeHold-open, stopper, backcheck device installation position"P" dimension
●This drawing shows right opening door.●This model can be used on both RH
and LH doors.●Door stopper must be installed
together.
Right hand door Left hand door
Position of door stopper device15mm or more
Center of hinge
93.5
48
29
10.5
13.5
319
29
10
78
156
138
114.5
10.5
156
319
138
48
32
1335
Hold-open device, stopper device installation position
13 126
22
φ16
126
324
Body
530
368348
126126
22
13
Guide rail
25
10
Arm
113553(Cut off on lateral door)
Backcheck valve400
12.5
65 or more60 or more120 or less
180 or less
1200
150077° 82° 87° 93° 99° 106°
CO-55CO-56
CO-155
Cut off
Latching speed adjustment valve
P
①②③④⑤⑥
2nd speed adjustment valve
1st speed adjustment valve
22.5
5-○+Flat head machine screw M5×12ℓ(with M4 head)
4-○+Flat head machine screw M6×16ℓ
Size 5, 6
20
(offset dimension) ① ② ③ ④ ⑤ ⑥
Model Applicable door size Applicable door thickness(mm)
Without hold-open With hold-open Width(mm) Weight(kg) Steel door Wooden door
Maximum. Opening angle
TypeHold-open device, stopper device installation position"P" dimension
●This drawing is for CO-55, 56 right hand.●This model can be used on both RH
and LH doors.●Door stopper must be installed
together.●2nd closing speed is adjusted with
uninstallation of closer unit.
Right hand door Left hand door
50 or more45 or more65 or less
85 or less
950
1050CO-53CO-54
CO-153CO-154
Model Applicable door size Applicable door thickness(mm)
Without hold-open With hold-open
CO-53BCCO-54BC
With backcheck Width(mm) Weight(kg) Steel door Wooden door
Center of hinge
Guide rail
Body
1st speed adjustment valve
Center of hinge
2nd speed adjustment valve
4-○+Flat head machine screw M5×12ℓ4-○+Tapping screw φ5×30ℓ
1234
Hold-open device, stopper device, backcheck device installation position
56
93
5-○+Flat head machine screw M5×12ℓ(with M4 head)
5-○+Tapping screw φ4×25ℓ
Arm
530
19
3.2
12
29
146
400
19
13 126 126 126 126 13
29
21
22
9.5 1299.5
155.5
542(Cut off on lateral door)
276
8 260 8
158
276155.5
58
.58
.59
3.2
3
31
P
23.5 229
φ12
158
23.5
20
31
70
.2
Size 2
45 or more40 or more45 or less900
A
B
19mm
29mm
14.5mm
23mm
76° 81° 86° 92° 98° 105°CO-52 CO-152 20
(offset dimension) ① ② ③ ④ ⑤ ⑥
Model
ModelCOU-52,53,
152,153,52BC,53BC
COU-52H,53H
Applicable door size Applicable door thickness(mm)
Without hold-open With hold-open
CO-52BC
With backcheck Width(mm) Weight(kg) Steel door Wooden door
Maximum. Opening angle
TypeHold-open, stopper, backcheck device installation position"P" dimension
●This drawing shows right opening door.●This model can be used on both RH and LH doors.●Door stopper must be installed
together.
Right hand door Left hand door
Cut off
Position of door stopper device15mm or more
DRAWING
CONCEALED DOOR CLOSERS
Maximum. Opening angle
TypeHold-open, stopper, backcheck device installation position
Hold-open, stopper, backcheck device installation position depends on "P" dimension. Hold-open, stopper, backcheck device installation position depends on "P" dimension.
Hold-open, stopper, backcheck device installation position depends on "P" dimension. Hold-open, stopper, backcheck device installation position depends on "P" dimension.
75°20
(offset dimension)"P" dimension
①
97°91°86°80°
② ③ ④ ⑤
104°
⑥
Position of door stopper device15mm or more
Cut off
39
3.2
68.2
12A
28
BCenter of hinge
Hold-open device, stopper device, backcheck device installation position
23
B
152
160
11.5
12613
296
φ12
250
8
160
3.2
53.5
9A3
152
P
19
28
296
280
126126
23
126
530
8
Guide rail
Arm22
146
6 105
544(Cut off on lateral door)
400
13
12 21
2nd speed adjustment valve
1st speed adjustment valve
5-○+Flat head machine screw M5×12ℓ(with M4 head)5-○+Tapping screw φ4×25ℓ
4-○+Flat head machine screw M5×12ℓ(with M4 head)
4-○+Tapping screw φ4×25ℓ
①⑥ ⑤ ④ ③ ②
Body
●This drawing is for COU-52, 53 right hand.●This model has right hand and left hand.●Door stopper must be installed together.
Latching speed adjustment valve
Size 2, 3 (Thinner body type)
Right hand door Left hand door
40 or more36 or more45 or less
65 or less
900
950COU-52COU-53
COU-152COU-153
Model Applicable door size Applicable door thickness(mm)
Without hold-open With hold-open
COU-52BCCOU-53BC
With backcheck
COU-52HCOU-53H
For Hotel Door(Thinner guide rail) Width(mm) Weight(kg) Steel door Wooden door
6 7
RYOBI LIMITED5-2-8 Toshima, Kita-ku Tokyo 114-8518, JapanTel. 81-3-3927-5536 Fax. 81-3-3927-5527RYOBI is a registered trade mark of Ryobi Limited A
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